fix(reports): WO Margin model name must match report_name + '_template' suffix

The previous fix swapped t-field -> t-esc so the QWeb error stopped,
but the report still printed blank. Root cause: Odoo looks up the
report data model via env['report.<report_name>'], but our model was
named 'report.fusion_plating_jobs.report_fp_job_margin' while the
action's report_name is 'fusion_plating_jobs.report_fp_job_margin_template'.
The model lookup missed, _get_report_values never fired, and the
template rendered with no 'rows' in scope — empty foreach -> empty
page.

Renamed the model to report.fusion_plating_jobs.report_fp_job_margin_template.

Verified: PDF size jumped from 1229 bytes (blank) to 125880 bytes
(fully populated). HTML now contains 'Job Margin', 'Step Breakdown',
and the actual WO name.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_jobs/__manifest__.py

@@ -3,7 +3,7 @@
 # License OPL-1 (Odoo Proprietary License v1.0)
 {
     'name': 'Fusion Plating — Native Jobs',
-    'version': '19.0.8.22.9',
+    'version': '19.0.8.22.10',
     'category': 'Manufacturing/Plating',
     'summary': 'Native plating job model — replaces mrp.production / mrp.workorder bridge.',
     'author': 'Nexa Systems Inc.',